Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Chemicals and Toxics
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Pesticides
    • Radon
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Guidance
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • EPA Administrator
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History
    • Staff Directory
Emergency Planning and Community Right-to-Know Act (EPCRA)
Contact Us

Final Rule: Extremely Hazardous Substance List and Threshold Planning Quantities; Emergency Planning and Release Notification Requirements (52 FR 13378)

April 22, 1987: Extremely Hazardous Substance (EHS) List and Threshold Planning Quantities; Emergency Planning and Release Notification Requirements; Final Rule. (52 FR 13378)

This Federal Register notice contains the EHS list of chemicals as published in 1987. This list has been revised over time and should not be used for current compliance purposes. The current EHS list can be found at 40 CFR 355.

Note: EPA was required to publish this Interim Final Rule 30 days after the Emergency Planning and Community Right-to-Know Act was passed. This rule established the list of EHSs and their threshold planning quantities. This rule also codifies the reporting and notification requirements for facilities at which EHSs are present. This rule was later finalized on April 22, 1987.

  • Final Rule: 52 FR 13378 (pdf) (17.21 MB)
  • November 17, 1986: Interim Final Rule. 51 FR 41570 (pdf) (3.01 MB)
  • EPCRA Home
  • About EPCRA
  • Emergency Planning
  • Emergency Release Notifications
  • Hazardous Chemical Inventory Reporting
  • EPCRA Trade Secrets
  • EPCRA Site Map
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 6, 2023
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data.gov
  • Inspector General
  • Jobs
  • Newsroom
  • Open Government
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.